文献类型：期刊文献

中文题名：小陇山林区不同类型锐齿槲栎次生林乔木层多样性与碳储量研究

英文题名：Arboreal layer diversity and carbon storage in secondary forests of Quercus aliena var.acuteserrata across different types in Xiaolongshan Mountain forest area,Gansu Province of northwestern China

作者：萨日娜[1] 杜月伟[1] 金海炎[2] 胡艳波[1] 张弓乔[1] 刘文桢[2] 赵中华[1]

第一作者：萨日娜

机构：[1]林木资源高效生产全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京100091;[2]甘肃省小陇山林业试验局林业科学研究所,甘肃省栎类次生林生态系统重点实验室,甘肃天水741022

年份：2025

卷号：47

期号：9

起止页码：14-23

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划(2022YFD2200503);国家自然科学基金面上项目(32171780)。

语种：中文

中文关键词：锐齿槲栎;次生林;乔木层;树种多样性;结构多样性;碳储量;结构方程模型

外文关键词：Quercus aliena var.acuteserrata;secondary forests;arborous layer;tree species diversity;structural diversity;carbon stocks;structural equation model(SEM)

分类号：S750

摘要：【目的】探究小陇山林区不同类型锐齿槲栎次生林乔木层树种多样性、结构多样性和碳储量及分配特征,为该地区森林经营及精准提升碳汇功能提供科学依据。【方法】依据林分断面积组成将研究区典型锐齿槲栎次生林划分为3个类型(栎阔混交林、栎类林和松栎混交林),计算3类次生林乔木层的树种多样性、结构多样性和碳储量及各器官碳分配,并用非参数检验方法进行差异性分析;利用结构方程模型分析树种多样性、结构多样性和碳储量的关系。【结果】(1)不同类型锐齿槲栎次生林乔木层多样性存在显著差异,栎阔混交林树种多样性显著高于栎类林和松栎混交林,其结构多样性均值(4.133±0.595)也显著高于栎类林(3.469±0.537)和松栎混交林(3.201±0.199)。(2)3类锐齿槲栎次生林乔木层在碳储量积累与分配上呈现显著差异,栎类林整体平均碳储量最高((94.528±2.523)t/hm^(2)),栎阔混交林次之((88.855±16.297)t/hm^(2)),松栎混交林最低((82.094±7.527)t/hm^(2));3类次生林碳储量器官分配也呈现显著的干、枝-根系碳储量为主导特征,干、枝碳储量占比合计达67.9%~79.1%,根系碳储量占比12.6%~19.4%,两者合计超过90%。(3)结构方程模型结果显示结构多样性对碳储量是显著正向影响(0.484,P<0.001),树种多样性对碳储量也是正向积极影响,但并不显著。【结论】3种类型锐齿槲栎次生林树种多样性、结构多样性和碳储量都存在显著差异,栎阔混交林的树种多样性、结构多样性和碳储量高于栎类林与松栎混交林;结构多样性相较于树种多样性对碳储量的贡献更大,提升森林生态系统结构多样性,可能更有利于增加碳储量。.
[Objective]To investigate the species diversity,structural diversity,carbon stocks,and allocation patterns in the arboreal layer of Quercus aliena var.acuteserrata-dominated secondary forests across different types in Xiaolongshan Mountain forest region,Gansu Province of northwestern China,and to provide a scientific foundation for forest management practices and precision-based enhancement of carbon sequestration capacity in this region.[Method]Based on stand basal area composition,the typical Quercus aliena var.acuteserrata secondary forests in the study area were classified into three types(oakbroadleaved mixed forest,oak forest,pine-oak mixed forest).The species diversity,structural diversity,carbon storage,and carbon allocation among different organs in the arborous layer of these secondary forest types were systematically calculated,with comparative analysis conducted using Kruskal-Wallis tests.Structural equation modeling(SEM)was subsequently employed to elucidate the relationship between species diversity,structural diversity,and carbon stocks.[Result](1)There were significant differences in the tree layer diversity of different types of Quercus aliena var.acuteserrata secondary forests.The tree species diversity of oak-broadleaved mixed forest was significantly higher than oak forest and the pine-oak mixed forest,and its average structural diversity was 4.133±0.595,which was also significantly higher than oak forest(3.469±0.537)and pine-oak mixed forest(3.201±0.199).(2)There were significant differences in carbon storage accumulation and allocation among tree layers of three types of secondary forests of Q.aliena var.acuteserrata.The overall average carbon storage of oak forest was the highest((94.528±2.523)t/ha),followed by oak broadleaved mixed forest((88.855±16.297)t/ha),and the lowest((82.094±7.527)t/ha)in pine oak mixed forest.The allocation of carbon storage organs in the three types of secondary forests also showed a significant dominance of stem branch-root carbon storage,with a total proportion of stem and branch carbon storage ranging from 67.9%to 79.1%,and root storage ranging from 12.6%to 19.4%,totaling over 90%.(3)The structural equation modeling results showed that structural diversity had a significant positive impact on carbon storage(0.484,P<0.001),and tree species diversity also had a positive impact on carbon storage,but it was not significant.[Conclusion]Significant differences in species diversity,structural diversity,and carbon stocks are identified among the three Quercus aliena var.acuteserrata secondary forest types.The oak-broadleaved mixed forest consistently exhibites higher species diversity,structural diversity,and carbon stocks compared with the oak forest and pine-oak mixed forest.Structural diversity contributes more substantially to carbon stocks than species diversity,highlighting that enhancing forest ecosystem structural complexity may represent a more effective strategy for augmenting carbon sequestration potential.